Winnebago County Child Support Agency
Oshkosh, Wisconsin
The Winnebago County Child Support Agency is at 415 Jackson Street, Room 170, Oshkosh, WI 54901. Call the office at (920) 236-4780. It serves Winnebago County.
How do I contact this office?
415 Jackson Street, Room 170Oshkosh, WI 54901
Mail: P.O. Box 2808, Oshkosh, WI 54903
- Phone
- (920) 236-4780
- TTY
- (877) 209-5209
- Before you go
- Office hours and walk in policies are set by each county or tribal agency. Several agencies ask you to call ahead or schedule an appointment to see your case specialist.
- CSA@winnebagocountywi.gov
- Fax
- (920) 303-3039
- Official page
- Office page
Is this my office?
This office serves Winnebago County.
Not your area? See every Wisconsin child support office.
Can I handle this without going in?
Often, yes. Many requests don't need a visit:
- Check your case and payments online in Child Support Online Services.
- Pay online, by phone, or by mail: see every way to pay child support in Wisconsin.
- Ask about your case by phone at (920) 236-4780.
Going in person? Read "Before you go" above, and call first if you can.
Other child support offices near Oshkosh
- Fond du Lac County Child Support Agency Fond du Lac · 18 miles away
- Outagamie County Child Support Agency Appleton · 18 miles away
- Calumet County Child Support Agency Chilton · 19 miles away
More help with Wisconsin child support
Office details come from the official Wisconsin office listing, checked October 18, 2026. Sunny Child Support is not affiliated with Wisconsin Department of Children and Families, Bureau of Child Support. Spot a mistake? Tell us.